Wow, I'm sure you must be gutted. I feel for you.
As for the oil loss, I'm with Karl - almost no chance of engine damage resulting from it. It is very surprising how long an engine can continue to run with the COMPLETE loss of all oil, and suffer no damage. The oil film on the bearings gives a lot of protection for longer than we could imagine. They used to have "engine blow" contests at shows; drain all the oil out, run it at WOT with no load, and clock how long before it gives. The winner is whomever guessed the correct time - usually several minutes to half an hour depending on the initial condition of the engine.
Your very unfortunate experience echos a fear I'm currently having for one of my X projects. In an effort to try and save time and effort I purchased a fiberglass front air dam for the car. Decades of experience tells me to never use a fiberglass front spoiler of any type. So I know it will only be a matter of time before mine gets damaged also. Sadly the one I bought was horrible quality so it ended up taking me as much time and effort as if I'd made my own from steel. That is something you might consider when the time comes to repair your damaged front dam - make one from sheet metal with a steel tube frame?
Hang in there buddy.